lowb版五子棋

*创建char二维数组储存棋盘状态（作为静态全局变量）
*初始化棋盘
*创建标志flag控制黑白交替下棋
*开始下棋 直到gameover
*创建isGameOver();来判断是否五子连珠
*创建printBoard();负责打印，每下一次棋打印一次
*创建takeChess(flag);负责下棋

import java.util.*;
    class gobang{
        static Scanner input = new Scanner(System.in);
        static String[][] chessBoard = new String[15][15];
        public static void main(String[] args){
            for(int i=0;i<15;i++){
                Arrays.fill(chessBoard[i] , ".");
            }
            int flag = 0;
            boolean gameOver = true;
            while(gameOver){
                printBoard();
                takeChess(flag);
                flag++;
                gameOver = isGameOver();
            }
            System.out.printf("游戏结束了！");
        }
        public static void printBoard(){
            System.out.print("   ");
            for(int k=0;k<15;k++){
                System.out.printf("%3d",k+1);
            } 
            System.out.println();
            System.out.println();
            for(int i=0;i<15;i++){
                System.out.printf("%3d",i+1);
                for(int j=0;j<15;j++){
                    System.out.printf("%3s",chessBoard[i][j]);
                }
                    System.out.println();
                    System.out.println();
                }
            }
        public static void takeChess(int flag){
            if(flag%2==0){
                do{
                    System.out.print("系统：>>>请白方下棋：(先输入纵坐标，再输入横坐标，两次回车) ");
                    int x = input.nextInt();
                    int y = input.nextInt();
                    if ((x<=1||x>=15)&&(y<=1||x>=14)){
                        System.out.println("输入错误，请重新输入。");
                        continue;
                    }
                    else if(!chessBoard[x-1][y-1].equals(".")){
                        System.out.println("输入错误，请重新输入。");
                        continue;
                    }
                    chessBoard[x-1][y-1]="o";
                    break;
                }while(true);
            }
            else{
                do{
                    System.out.print("系统：>>>请黑方下棋：(先输入纵坐标，再输入横坐标，两次回车) ");
                    int x = input.nextInt();
                    int y = input.nextInt();
                    if ((x<=0||x>15)&&(y<=0||y>=15)){
                        System.out.println("输入错误，请重新输入。");
                        continue;
                    }
                    else if(!chessBoard[x-1][y-1].equals(".")){
                        System.out.println("输入错误，请重新输入。");
                        continue;
                    }
                    chessBoard[x-1][y-1]="*";
                    break;
                }while(true);
            }
        }
        public static boolean isGameOver(){
            for(int i=4;i<11;i++){
                for(int j=0;j<11;j++){
                    if(chessBoard[i][j]!="."){
                        int count =1;
                        for(int k=0;k<5;k++){//向右判断
                            if(chessBoard[i][j]==chessBoard[i][j+k+1]){
                                count++;
                            }
                            if(count>=5){
                                return false;
                            }
                        }
                        count =1;
                        for(int k=0;k<4;k++){//向下判断
                            if(chessBoard[i][j]==chessBoard[i+k+1][j]){
                                count++;
                            }
                            if(count>=5){
                                return false;
                            }
                        }
                        count =1;
                        for(int k=0;k<4;k++){//向右上判断
                            if(chessBoard[i][j]==chessBoard[i+k+1][j+k+1]){
                                count++;
                            }
                            if(count>=5){
                                return false;
                            }
                        }
                        count =1;
                        for(int k=0;k<4;k++){//向右下判断
                            if(chessBoard[i][j]==chessBoard[i-k-1][j+k+1]){
                                count++;
                            }
                            if(count>=5){
                                return false;
                            }
                        }
                    }
                }

            }
           return true;
        }
    }